浅谈低压电力线载波信道阻抗测试终端的设计与应用

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1、总第49卷第553期电测与仪表Vo1．49NO．5532012年第1期ElectricalMeasurement&InstrumentationJan．2012低压电力线载波信道阻抗测试终端的设计与应用齐传凤，王学伟，韩东，陆以彪(1．北京化工大学信息科学与技术学院，北京100029；2．黑龙江省电力科学研究院，哈尔滨150030)摘要：依据自由坐标轴阻抗测试原理，设计了低压电力线载波信道阻抗测试终端，实现了载波信道阻抗模值和阻抗相位的实时测量、数据远程传输以及主站监控计算机对信道阻抗特性的远程监控。阻抗测试终端依据主站监控计算机的控制命令，能够实现在100

2、～500kHz频率范围内的任意5个载波频率点或单一载波频率点处，同时对A、B、c三相或某一相的循环阻抗测试，且载波频率点间的最小间隔为0．1kHz。阻抗测试范围与精度可达到(510Q)±10％、(10-5001~)±5％。本文分析了公用建筑不同季节和住宅小区冬季载波通信性能较差情况下的电力线信道阻抗测量结果，为电力线阻抗监测及改善电力线载波系统通信性能提供有力手段。关键词：低压电力线载波通信；信道阻抗测试；数据传输中图分类号：TM930文献标识码：A文章编号：1001—1390(2012)01—0057—06DesignandApplicationofLow

3、-voltagePowerLineCarrierChannelImpedanceTestingTerminal1l22QIChuan-feng，WANGXue-wei，HANDong，LUYi—biao(1．CollegeofInformationScienceandTechnology，BeijingUniversityofChemicalTechnology，Beijing100029，China．2．ElectricPowerResearchInstituteofHeilongjiangProvince，Harbin150030，China．)Abst

4、ract：Inthispaper，alow-voltagepowerlinecarrierchannelimpedancetestingterminalisdesignedaccordingtoimpedancemeasureprincipleoffree-axis，whichrealizesreal—timemeasurementforimpedanceandphasesofcarrierchannel，dataremotetransmissionandremotemonitoringfortheimpedancecharacteristicsofcarr

5、ierchannelbythemastermonitorcomputer．Accordingtothecommandsfromthemastermonitorcomputer，atthefrequencyof100-500kHz，theimpedancetestingterminalcanrealizecycletestingfortheimpedancephaseA，B，Catthesametimeoroneofthethreephasesatanyfivecarrierfrequenciesorsinglecarrierfrequency，andthem

6、inimumintervalbetweencarrierfrequenciesis0．1kHz．Therangeandaccuracyoftheimpedancetestingcanreach(5-10~)±10％and(10～500)±5％．Inthispaper，theimpedancemeasurementresultsofpowerlinechannelarediscussed，whichweremeasuredinpublicbuildingindifferentseasonsandinresidentialdistrictunderthelow-

7、voltagepowerlinecarriercommunicationwithpoorperformanceinwinter，andprovidepowerfulmeansforpowerlineimpedancemonitoringandcommunicationperformanceofpowerlinecarriersystemimproving．Keywords：low-voltagePLC，channelimpedancemeasurement，datatransmission0引言通信与中高压电力线载波通信在通信方式、信道衰减电力线载波通信(P

8、owerLineCommunication，特性、布